1. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved COS 260 DAY 4 Tony Gauvin

2. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Ch 1 -2 Agenda Questions? Blackboard Finish Basic Computation Programming lab Assignment 1 Posted Due September 18 (beginning of next class) Upload *.java and *.class files in one zip file Java Code must be commented with Your name Date Assignment number, program number Example : /* Tony Gauvin September 14, 2014 Assignment1 – program 2 */

3. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Basic Computation Chapter 2

4. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Review List 8 Primitive data types and memory required to store each. Rules and convention for creating identifiers Casting? Arithmetic “Java Style” Unary vs binary Prefix be postfix Precedence double aNum = 5.0, dNum = 6.0 ; long bNum = 2, cNum = 3, daResult = 0; daResult = bNum/cNum*aNum/dNum*bNum%cNum + 3; What is the value of daResult?

5. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved The Class String We've used constants of type String already. "Enter a whole number from 1 to 99." A value of type String is a Sequence of characters Treated as a single item.

6. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved String Constants and Variables Declaring String greeting; greeting = "Hello!"; or String greeting = "Hello!"; or String greeting = new String("Hello!"); Printing System.out.println(greeting);

7. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Concatenation of Strings Two strings are concatenated using the + operator. String greeting = "Hello"; String sentence; sentence = greeting + " officer"; System.out.println(sentence); Any number of strings can be concatenated using the + operator. (+ is a overloaded operator)

8. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Concatenating Strings and Integers String solution; solution = "The answer is " + 42; System.out.println (solution); The temperature is 72 The answer is 42

9. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved String Methods An object of the String class stores data consisting of a sequence of characters. Objects have methods as well as data The length() method returns the number of characters in a particular String object. String greeting = "Hello"; int n = greeting.length(); http://docs.oracle.com/javase/8/docs/api/java/lang/St ring.html

10. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved The Method length() The method length() returns an int. You can use a call to method length() anywhere an int can be used. int count = command.length(); System.out.println("Length is " + command.length()); count = command.length() + 3;

11. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Figure 2.4 Positions start with 0, not 1. The 'J' in "Java is fun." is in position 0 A position is referred to an an index. The ' f' in "Java is fun." is at index 8. String Indices

12. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved b = s.equalsIgnoreCase(“java”)

13. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved

14. String Processing No methods allow you to change the value of a String object. But you can change the value of a String variable. View sample program StringDemo listing 2.4sample program Sample Screen Output

15. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Escape Characters How would you print "Java" refers to a language. ? The compiler needs to be told that the quotation marks ( " ) do not signal the start or end of a string, but instead are to be printed. System.out.println( "\"Java\" refers to a language.");

16. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Escape Characters Figure 2.6 Each escape sequence is a single character even though it is written with two symbols.

17. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Examples System.out.println("abc\\def"); System.out.println("new\nline"); char singleQuote = '\''; System.out.println (singleQuote); ' abc\def new line

18. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved The Unicode Character Set Most programming languages use the ASCII character set. Java uses the Unicode character set which includes the ASCII character set. The Unicode character set includes characters from many different alphabets (but you probably won't use them). http://unicode-table.com/en/

19. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Keyboard and Screen I/O: Outline Screen Output Keyboard Input

20. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Screen Output We've seen several examples of screen output already. System.out is an object that is part of Java. println() is one of the methods available to the System.out object.

21. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Screen Output The concatenation operator ( + ) is useful when everything does not fit on one line. System.out.println("Lucky number = " + 13 + "Secret number = " + number); Do not break the line except immediately before or after the concatenation operator ( + ).

22. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Screen Output Alternatively, use print() System.out.print("One, two,"); System.out.print(" buckle my shoe."); System.out.println(" Three, four,"); System.out.println(" shut the door."); ending with a println(). System.out.print(“one, two\n”); is the same as System.out.println(“one, two”)

23. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Keyboard Input Java has reasonable facilities for handling keyboard input. These facilities are provided by the Scanner class in the java.util package. A package is a library of classes. http://docs.oracle.com/javase/7/docs/api/java/util/Scann er.html http://docs.oracle.com/javase/7/docs/api/java/util/Scann er.html

24. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Using the Scanner Class Near the beginning of your program, insert import java.util.Scanner; Create an object of the Scanner class Scanner keyboard = new Scanner (System.in) Read data (an int or a double, for example) int n1 = keyboard.nextInt(); double d1 = keyboard,nextDouble();

25. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Keyboard Input Demonstration View sample program class ScannerDemo, listing 2.5sample program Sample Screen Output

26. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Some Scanner Class Methods Figure 2.7a

27. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Some Scanner Class Methods Figure 2.7b

28. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved nextLine() Method Caution The nextLine() method reads The remainder of the current line, Even if it is empty.

29. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved nextLine() Method Caution Example – given following declaration. int n; String s1, s2; n = keyboard.nextInt(); s1 = keyboard.nextLine(); s2 = keyboard.nextLine(); Assume input shown n is set to 42 but s1 is set to the empty string. 42 and don't you forget it.

30. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved The Empty String A string can have any number of characters, including zero. The string with zero characters is called the empty string. The empty string is useful and can be created in many ways including String s3 = "";

31. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Other Input Delimiters (optional) Almost any combination of characters and strings can be used to separate keyboard input. to change the delimiter to "##" keyboard2.useDelimiter("##"); whitespace will no longer be a delimiter for keyboard2 input

32. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Other Input Delimiters View sample program class DelimitersDemo, listing 2.6sample program Sample Screen Output

33. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Other Input Delimiters (‘,’) Scanner keyboard2 = new Scanner (System.in); double aNum=0.0,bNum =0.0; keyboard2.useDelimiter (","); System.out.println ("Enter a line of text with two numbers"); System.out.println ("delimited by ',' "); aNum = keyboard2.nextDouble (); bNum = keyboard2.nextDouble (); System.out.println ("the two numbers are \"" + aNum + "\" and \"" + bNum + "\""); DelimitersDemo2.java

34. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Formatting output with. printf Allows formatting of System.out out put Use System.out.printf( - text to print with %N(char type) inserted- ) Examples %3c ; %5d, %24s %e, %5.2f DelimitersDemo2.java

35. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Documentation and Style: Outline Meaningful Names Comments Indentation Named Constants

36. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Documentation and Style Most programs are modified over time to respond to new requirements. Programs which are easy to read and understand are easy to modify. Even if it will be used only once, you have to read it in order to debug it.

37. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Meaningful Variable Names A variable's name should suggest its use. Observe conventions in choosing names for variables. Use only letters and digits. "Punctuate" using uppercase letters at word boundaries (e.g. taxRate ). Start variables with lowercase letters. Start class names with uppercase letters.

38. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Comments The best programs are self-documenting. Clean style Well-chosen names Comments are written into a program as needed explain the program. They are useful to the programmer, but they are ignored by the compiler.

39. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Comments A comment can begin with //. Everything after these symbols and to the end of the line is treated as a comment and is ignored by the compiler. double radius; //in centimeters

40. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Comments A comment can begin with /* and end with */ Everything between these symbols is treated as a comment and is ignored by the compiler. /* This program should only be used on alternate Thursdays, except during leap years, when it should only be used on alternate Tuesdays. */

41. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Comments A javadoc comment, begins with /** and ends with */. It can be extracted automatically from Java software. /** method change requires the number of coins to be nonnegative */ More on javadoc later in course and @ http://www.oracle.com/technetwork/java/javase/documen tation/index-jsp-135444.html

42. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved When to Use Comments Begin each program file with an explanatory comment What the program does The name of the author Contact information for the author Date of the last modification. Provide only those comments which the expected reader of the program file will need in order to understand it.

43. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Comments Example View sample program class CircleCalculation, listing 2.7sample program Sample Screen Output

44. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Indentation Indentation should communicate nesting clearly. Nesting occurs when we do branching and loops A good choice is four spaces for each level of indentation. Indentation should be consistent. Indentation should be used for second and subsequent lines of statements which do not fit on a single line.

45. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Indentation Indentation does not change the behavior of the program. Proper indentation helps communicate to the human reader the nested structures of the program

46. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Using Named Constants To avoid confusion, always name constants (and variables). area = PI * radius * radius; is clearer than area = 3.14159 * radius * radius; Place constants near the beginning of the program.

47. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Named Constants Once the value of a constant is set (or changed by an editor), it can be used (or reflected) throughout the program. public static final double INTEREST_RATE = 6.65; If a literal (such as 6.65) is used instead, every occurrence must be changed, with the risk than another literal with the same value might be changed unintentionally.

48. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Declaring Constants Syntax public static final Variable_Type = Constant; Examples public static final double PI = 3.14159; public static final String MOTTO = "The customer is always right."; By convention, uppercase letters are used for constants.

49. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Named Constants View sample program class CircleCalculation2, listing 2.8sample program Sample Screen Output

50. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Graphics Supplement: Outline Style Rules Applied to a Graphics Applet JFrame JOptionPane Inputting Numeric Types Multi-Line Output Windows

51. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Style Rules Applied to a Graphics Applet View sample program class HappyFace, listing 2.9sample program Sample Screen Output

52. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Style Rules Applied to a Graphics Applet Named constants makes it easier to find values. Comments and named constants make changing the code much easier. Named constants protect against changing the wrong value.

53. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Creating a JFrame Application The class JFrame can be used to create a standalone GUI application Full explanation of how this work in Chapter 8 Similar to creating an applet 1.Replace the line import javax.swing.JApplet; with import javax.swing.JFrame;

54. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Creating a JFrame Application 2. Replace the text extends JApplet; with extends JFrame; 3. Add what is called a constructor (constrcuts the object) public NameOfClass() { setSize(600,400); setDefaultCloseOperation(EXIT_ON_CLOSE); }

55. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Creating a JFrame Application 4. Add a main method that displays the window public static void main(String[] args) { HappyFace guiWindow = new HappyFace(); guiWindow.setVisible(true); } 5. View sample program class HappyFaceJFrame, listing 2.10sample program

56. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane View sample program class JOptionPaneDemo, listing 2.11sample program Sample Screen Output

57. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane JOptionPane can be used to construct windows that interact with the user. The JOptionPane class is imported by import javax.swing.JApplet; The JOptionPane class produces windows for obtaining input or displaying output. http://docs.oracle.com/javase/tutorial/uiswing/co mponents/dialog.html http://docs.oracle.com/javase/tutorial/uiswing/co mponents/dialog.html

58. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane Use showInputDialog() for input. Only string values can be input. To convert an input value from a string to an integer use the parseInt() method from the Integer class, use appleCount = Integer.parseInt(appleString);

59. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane Output is displayed using the showMessageDialog method. JOptionPane.showMessageDialog(null, "The total number of fruits = " + totalFruitCount);

60. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane Syntax Input String_Variable = JOptionPane.showInputDialogue (String_Expression); Output JOptionPane.showMessageDialog (null, String_Expression); System.exit(0) ends the program.

61. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved JOptionPane Cautions If the input is not in the correct format, the program will crash. If you omit the last line ( System.exit(0) ), the program will not end, even when the OK button in the output window is clicked. Always label any output.

62. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Inputting Numeric Types JOptionPane.showInputDialog can be used to input any of the numeric types. Figure 2.8 Methods for converting strings to numbers

63. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Multi-Line Output Windows To output multiple lines using the method JOptionPane.showMessageDialog, insert the new line character '\n' into the string used as the second argument. OptionPane.showMessageDialog(null, "The number of apples\n" + "plus the number of oranges\n" + "is equal to " + totalFruit);

64. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Multi-Line Output Windows Figure 2.9 A dialog window containing multiline output

65. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Programming Example View sample program class ChangeMakerWindow, listing 2.12sample program Sample Screen Output

66. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Summary You have become familiar with Java primitive types (numbers, characters, etc.). You have learned about assignment statements and expressions. You have learned about stings. You have become familiar with classes, methods, and objects.

67. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Summary You have learned about simple keyboard input and screen output. You have learned about windows-based input and output using the JOptionPane class.

68. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Programming Lab Assignment 1 1.Make a 3-d cube using characters 2.Make a snowman applet 3.Convert Fahrenheit to Celsius 4. Favorite color, food and animal for a friend 5.Convert binary to decimal use JOptionPane Input 4 digit binary  dddd where d is 1 or zero Output decimal number Grading rubric 1)Program compiles, runs and produces correct output  90% 2)Stylistic conventions followed  5% 3)Properly commented  5%

69. JAVA: An Introduction to Problem Solving & Programming, 7 th Ed. By Walter Savitch ISBN 0133862119 © 2015 Pearson Education, Inc., Upper Saddle River, NJ. All Rights Reserved Hints Create templates to speed your work Leverage Sample programs All programing projects use techniques shown in chapter Figure out the algorithm FIRST! Diagram as psuedocode in program comments